Fix CUDA backend missing U32_firstbitlow implementation (#7921)

2025-07-29T05:35:14+00:00

* Initial plan * Add U32_firstbitlow implementation for CUDA and CPP backends Co-authored-by: bmillsNV <163073245+bmillsNV@users.noreply.github.com> * Add I32_firstbitlow and comprehensive testing for signed/unsigned firstbitlow Co-authored-by: bmillsNV <163073245+bmillsNV@users.noreply.github.com> * Convert firstbitlow test to use inline filecheck syntax Co-authored-by: ArielG-NV <159081215+ArielG-NV@users.noreply.github.com> * Add U32_firstbithigh and I32_firstbithigh implementations for CUDA and CPP backends Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com> * Update prelude/slang-cpp-scalar-intrinsics.h * Update prelude/slang-cpp-scalar-intrinsics.h * Update prelude/slang-cpp-scalar-intrinsics.h * Refactor Metal bit intrinsics to handle zero case correctly Co-authored-by: ArielG-NV <159081215+ArielG-NV@users.noreply.github.com> * Update slang-cuda-prelude.h remove fake links * Update hlsl.meta.slang * if -1, return -1 due to implicit hlsl rule * -1 or 0 is ~0u as per hlsl implictly * 0 or -1 as per hlsl * fix the math to map to hlsl * fix compile error * forgot `31 - clz` * format code (#7943) Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com> * Update source/slang/hlsl.meta.slang * Update source/slang/hlsl.meta.slang * Update source/slang/hlsl.meta.slang * Update source/slang/hlsl.meta.slang --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: bmillsNV <163073245+bmillsNV@users.noreply.github.com> Co-authored-by: ArielG-NV <159081215+ArielG-NV@users.noreply.github.com> Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com> Co-authored-by: ArielG-NV Co-authored-by: slangbot Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

slang.git/tests/hlsl-intrinsic/firstbitlow.slang, branch master

Fix CUDA backend missing U32_firstbitlow implementation (#7921)